package com.ldx.lock8;

import java.util.concurrent.TimeUnit;

/**
 * 静态方法
 */
public class Test3 {
    public static void main(String[] args) {
        Phone3 phone = new Phone3();
        new Thread(()-> {
            phone.sendSms();
        },"A").start();

        try {
            TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        new Thread(()-> {
            phone.call();
        },"B").start();
    }
}

class Phone3 {
    //synchronized 锁的对象是方法的调用者
    //两个方法用的同一个锁，谁先拿到谁先执行
    public static synchronized void sendSms() {
        try {
            TimeUnit.SECONDS.sleep(4);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("sendSms");
    }

    public static synchronized void call() {
        System.out.println("call");
    }

}

